dsantan.....it's a two step process. With the wheel off the ground, snug the nut up by hand to make sure there are no burrs on the nut or spindle threads. Torque the nut to 17 lb-ft, then back it off slightly. Retorque it to 5 lb-ft. If the slot in the nut lines up with the hole in the spindle, put in the cotter pin. If it doesn't, back it off slightly until it does......John